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16 April, 12:00

A family has 2 cars. the first car has a fuel efficiency of 15 miles per gallon of gas and the second has a fuel efficiency of 20 miles per gallon of gas. during one particular week, the 2 cars went a combined total of 1300 miles, for a total gas consumption of 75 gallons. How man gallons were consumed by each of the cars that week?

car 1:

car 2:

+1
Answers (1)
  1. 16 April, 15:44
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    Car 1: 15x

    Car 2: 20y

    15x+20y=1300

    x+y=75

    So y=75-x

    15x+20 (75-x) = 1300

    -5x+1500=1300

    -5x=-200

    x=40.

    y=75-40

    y=35

    Car 1: 40 gallons

    Car 2: 35 gallons
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